# Agent Result Confidence Check

> Agent Result Confidence Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-16).

Validates whether a confidence value falls within caller-supplied minimum and maximum bounds, returning acceptance/rejection status with mismatch reasons and normalized evidence.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/agent-result-confidence-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-result-confidence-check-9d5e83e5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OcOTgkejGFcGRORBlgDSd

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agent-result-confidence-check-9d5e83e5 -d '<json body>'
```

Example prompt: Before we accept this agent result and pay for it, check if the confidence score of 0.82 falls within our acceptable range of 0.75 to 0.95 — give me the acceptance status and any mismatch reasons.

## When to prefer this

Use this endpoint when you need a lightweight, in-memory, stateless bounds check on a confidence value before committing to an x402 payment or accepting an agent delivery. It is specifically designed for agentic x402 workflows where you need explicit acceptance/rejection signals with mismatch reasons rather than a simple boolean comparison — prefer it over rolling your own bounds logic when auditability and normalized evidence are needed.

## Known failure modes

- Missing required fields (confidence, minimum, or maximum) returns a validation error
- Inverted bounds (minimum greater than maximum) may produce unexpected behavior or an error
- Non-numeric values for confidence/minimum/maximum cause schema validation failures
- Network timeout or service unavailability returns a 5xx error
- Malformed request body returns a 400 bad request

## How this service works

Agent Result Confidence Check: Agent Result Confidence Check checks a confidence value against caller bounds without validating truth from bounded caller-supplied values without an external provider. Call Agent Result Confidence Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for Agent Result Confiden…

## Output

Returns a structured response containing an explicit acceptance or rejection status, contract-specific check results, normalized evidence values, and detailed mismatch reasons explaining why the confidence value passed or failed the caller-supplied bounds.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "maximum": {
   "type": "number",
   "description": "Maximum supplied to Agent Result Confidence Check; used only for this bounded calculation and processed in memory without retention."
  },
  "minimum": {
   "type": "number",
   "description": "Minimum supplied to Agent Result Confidence Check; used only for this bounded calculation and processed in memory without retention."
  },
  "confidence": {
   "type": "number",
   "description": "Confidence supplied to Agent Result Confidence Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "confidence": 0.8,
   "within_bounds": true,
   "truth_verified": false
  },
  "schema": "delx/util-agent-result-confidence-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "90c68bb6b265d2ee3e4e47bc8083dfa4ebca66986876b1ec220a835139832b3f",
   "external_calls": 0
  },
  "operation": "delivery_contract:agent_result_confidence_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-result-confidence-check-9d5e83e5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)